Polyphenol-coated hollow fiber system for energy-efficient dehumidification in air-conditioning

Lakshmeesha Upadhyaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizábal, Radoslaw Gorecki, Suzana P. Nunes*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Increasing temperatures have worldwide become a high health risk. High humidity aggravates the risk and reduces the comfort perception. Conventional air conditioners produce annually the equivalent of 2150 million carbon dioxide tons per year. Dehumidification is responsible for a large portion of it. Membrane-based dehumidification is energy-efficient since water vapor removal is carried out at isothermal conditions without toxic materials. This work demonstrates a membrane dehumidification system based on industry-ready prototypes containing polymeric hollow fibers coated with a green polyphenol coating, showcasing/exhibiting a remarkable water vapor transport rate with selectivity. Long-term testing proved over a year of operation with only a minimal decline in vapor transport. And the proposed system has 4–5 times higher coefficient of performance (COP) than conventional dehumidifiers, and it is a highly competitive energy-saving device with a low contribution to emissions and a smaller footprint.

Original languageEnglish (US)
Article number122215
JournalJournal of Membrane Science
StatePublished - Feb 2024

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.


  • Coefficient of performance
  • Dehumidification
  • Green coating
  • Hollow fibers
  • Polyphenol

ASJC Scopus subject areas

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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